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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">com.google.android.exoplayer2.util</a></div>
<h2 title="Class ListenerSet" class="title">Class ListenerSet&lt;T&gt;</h2>
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<ul class="inheritance">
<li><a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">java.lang.Object</a></li>
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<li>com.google.android.exoplayer2.util.ListenerSet&lt;T&gt;</li>
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<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>T</code> - The listener type.</dd>
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<hr>
<pre>public final class <span class="typeNameLabel">ListenerSet&lt;T&gt;</span>
extends <a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a></pre>
<div class="block">A set of listeners.

 <p>Events are guaranteed to arrive in the order in which they happened even if a new event is
 triggered recursively from another listener.

 <p>Events are also guaranteed to be only sent to the listeners registered at the time the event
 was enqueued and haven't been removed since.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static interface&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ListenerSet.Event.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.Event</a>&lt;<a href="ListenerSet.Event.html" title="type parameter in ListenerSet.Event">T</a>&gt;</span></code></th>
<td class="colLast">
<div class="block">An event sent to a listener.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static interface&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ListenerSet.IterationFinishedEvent.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.IterationFinishedEvent</a>&lt;<a href="ListenerSet.IterationFinishedEvent.html" title="type parameter in ListenerSet.IterationFinishedEvent">T</a>&gt;</span></code></th>
<td class="colLast">
<div class="block">An event sent to a listener when all other events sent during one <a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top"><code>Looper</code></a> message queue
 iteration were handled by the listener.</div>
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(android.os.Looper,com.google.android.exoplayer2.util.Clock,com.google.android.exoplayer2.util.ListenerSet.IterationFinishedEvent)">ListenerSet</a></span>&#8203;(<a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top">Looper</a>&nbsp;looper,
           <a href="Clock.html" title="interface in com.google.android.exoplayer2.util">Clock</a>&nbsp;clock,
           <a href="ListenerSet.IterationFinishedEvent.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.IterationFinishedEvent</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;iterationFinishedEvent)</code></th>
<td class="colLast">
<div class="block">Creates a new listener set.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#add(T)">add</a></span>&#8203;(<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&nbsp;listener)</code></th>
<td class="colLast">
<div class="block">Adds a listener to the set.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="ListenerSet.html" title="class in com.google.android.exoplayer2.util">ListenerSet</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#copy(android.os.Looper,com.google.android.exoplayer2.util.ListenerSet.IterationFinishedEvent)">copy</a></span>&#8203;(<a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top">Looper</a>&nbsp;looper,
    <a href="ListenerSet.IterationFinishedEvent.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.IterationFinishedEvent</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;iterationFinishedEvent)</code></th>
<td class="colLast">
<div class="block">Copies the listener set.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#flushEvents()">flushEvents</a></span>()</code></th>
<td class="colLast">
<div class="block">Notifies listeners of events previously enqueued with <a href="#queueEvent(int,com.google.android.exoplayer2.util.ListenerSet.Event)"><code>queueEvent(int, Event)</code></a>.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#lazyRelease(int,com.google.android.exoplayer2.util.ListenerSet.Event)">lazyRelease</a></span>&#8203;(int&nbsp;releaseEventFlag,
           <a href="ListenerSet.Event.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.Event</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;releaseEvent)</code></th>
<td class="colLast">
<div class="block">Releases the set of listeners after all already scheduled <a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top"><code>Looper</code></a> messages were able to
 trigger final events.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#queueEvent(int,com.google.android.exoplayer2.util.ListenerSet.Event)">queueEvent</a></span>&#8203;(int&nbsp;eventFlag,
          <a href="ListenerSet.Event.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.Event</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;event)</code></th>
<td class="colLast">
<div class="block">Adds an event that is sent to the listeners when <a href="#flushEvents()"><code>flushEvents()</code></a> is called.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#release()">release</a></span>()</code></th>
<td class="colLast">
<div class="block">Releases the set of listeners immediately.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#remove(T)">remove</a></span>&#8203;(<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&nbsp;listener)</code></th>
<td class="colLast">
<div class="block">Removes a listener from the set.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sendEvent(int,com.google.android.exoplayer2.util.ListenerSet.Event)">sendEvent</a></span>&#8203;(int&nbsp;eventFlag,
         <a href="ListenerSet.Event.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.Event</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;event)</code></th>
<td class="colLast">
<div class="block"><a href="#queueEvent(int,com.google.android.exoplayer2.util.ListenerSet.Event)"><code>Queues</code></a> a single event and immediately <a href="#flushEvents()"><code>flushes</code></a> the event queue to notify all listeners.</div>
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<code><a href="https://developer.android.com/reference/java/lang/Object.html#clone()" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang" class="externalLink">toString</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://developer.android.com/reference/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink" target="_top">wait</a></code></li>
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<h3>Constructor Detail</h3>
<a id="&lt;init&gt;(android.os.Looper,com.google.android.exoplayer2.util.Clock,com.google.android.exoplayer2.util.ListenerSet.IterationFinishedEvent)">
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<h4>ListenerSet</h4>
<pre>public&nbsp;ListenerSet&#8203;(<a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top">Looper</a>&nbsp;looper,
                   <a href="Clock.html" title="interface in com.google.android.exoplayer2.util">Clock</a>&nbsp;clock,
                   <a href="ListenerSet.IterationFinishedEvent.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.IterationFinishedEvent</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;iterationFinishedEvent)</pre>
<div class="block">Creates a new listener set.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>looper</code> - A <a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink"><code>Looper</code></a> used to call listeners on. The same <a href="https://developer.android.com/reference/android/os/Looper.html?is-external=true" title="class or interface in android.os" class="externalLink" target="_top"><code>Looper</code></a> must be used
     to call all other methods of this class.</dd>
<dd><code>clock</code> - A <a href="Clock.html" title="interface in com.google.android.exoplayer2.util"><code>Clock</code></a>.</dd>
<dd><code>iterationFinishedEvent</code> - An <a href="ListenerSet.IterationFinishedEvent.html" title="interface in com.google.android.exoplayer2.util"><code>ListenerSet.IterationFinishedEvent</code></a> sent when all other events sent
     during one <a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top"><code>Looper</code></a> message queue iteration were handled by the listeners.</dd>
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<h4>copy</h4>
<pre class="methodSignature">@CheckResult
public&nbsp;<a href="ListenerSet.html" title="class in com.google.android.exoplayer2.util">ListenerSet</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;copy&#8203;(<a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top">Looper</a>&nbsp;looper,
                           <a href="ListenerSet.IterationFinishedEvent.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.IterationFinishedEvent</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;iterationFinishedEvent)</pre>
<div class="block">Copies the listener set.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>looper</code> - The new <a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top"><code>Looper</code></a> for the copied listener set.</dd>
<dd><code>iterationFinishedEvent</code> - The new <a href="ListenerSet.IterationFinishedEvent.html" title="interface in com.google.android.exoplayer2.util"><code>ListenerSet.IterationFinishedEvent</code></a> sent when all other events
     sent during one <a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top"><code>Looper</code></a> message queue iteration were handled by the listeners.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The copied listener set.</dd>
</dl>
</li>
</ul>
<a id="add(java.lang.Object)">
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<h4>add</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;add&#8203;(<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&nbsp;listener)</pre>
<div class="block">Adds a listener to the set.

 <p>If a listener is already present, it will not be added again.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - The listener to be added.</dd>
</dl>
</li>
</ul>
<a id="remove(java.lang.Object)">
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<h4>remove</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;remove&#8203;(<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&nbsp;listener)</pre>
<div class="block">Removes a listener from the set.

 <p>If the listener is not present, nothing happens.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - The listener to be removed.</dd>
</dl>
</li>
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<h4>queueEvent</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;queueEvent&#8203;(int&nbsp;eventFlag,
                       <a href="ListenerSet.Event.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.Event</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;event)</pre>
<div class="block">Adds an event that is sent to the listeners when <a href="#flushEvents()"><code>flushEvents()</code></a> is called.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>eventFlag</code> - An integer indicating the type of the event, or <a href="../C.html#INDEX_UNSET"><code>C.INDEX_UNSET</code></a> to
     report this event without flag.</dd>
<dd><code>event</code> - The event.</dd>
</dl>
</li>
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<h4>flushEvents</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;flushEvents()</pre>
<div class="block">Notifies listeners of events previously enqueued with <a href="#queueEvent(int,com.google.android.exoplayer2.util.ListenerSet.Event)"><code>queueEvent(int, Event)</code></a>.</div>
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<h4>sendEvent</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;sendEvent&#8203;(int&nbsp;eventFlag,
                      <a href="ListenerSet.Event.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.Event</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;event)</pre>
<div class="block"><a href="#queueEvent(int,com.google.android.exoplayer2.util.ListenerSet.Event)"><code>Queues</code></a> a single event and immediately <a href="#flushEvents()"><code>flushes</code></a> the event queue to notify all listeners.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>eventFlag</code> - An integer flag indicating the type of the event, or <a href="../C.html#INDEX_UNSET"><code>C.INDEX_UNSET</code></a> to
     report this event without flag.</dd>
<dd><code>event</code> - The event.</dd>
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<h4>release</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;release()</pre>
<div class="block">Releases the set of listeners immediately.

 <p>This will ensure no events are sent to any listener after this method has been called.</div>
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<h4>lazyRelease</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;lazyRelease&#8203;(int&nbsp;releaseEventFlag,
                        <a href="ListenerSet.Event.html" title="interface in com.google.android.exoplayer2.util">ListenerSet.Event</a>&lt;<a href="ListenerSet.html" title="type parameter in ListenerSet">T</a>&gt;&nbsp;releaseEvent)</pre>
<div class="block">Releases the set of listeners after all already scheduled <a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top"><code>Looper</code></a> messages were able to
 trigger final events.

 <p>After the specified released callback event, no other events are sent to a listener.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>releaseEventFlag</code> - An integer flag indicating the type of the release event, or <a href="../C.html#INDEX_UNSET"><code>C.INDEX_UNSET</code></a> to report this event without a flag.</dd>
<dd><code>releaseEvent</code> - The release event.</dd>
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